CN219202743U - Impedance composite muffler - Google Patents

Impedance composite muffler Download PDF

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Publication number
CN219202743U
CN219202743U CN202223486234.0U CN202223486234U CN219202743U CN 219202743 U CN219202743 U CN 219202743U CN 202223486234 U CN202223486234 U CN 202223486234U CN 219202743 U CN219202743 U CN 219202743U
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pipeline
partition plate
cavity
muffler
sound
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CN202223486234.0U
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Chinese (zh)
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蒋剑强
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Jiangsu Xuncheng Machinery Co ltd
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Jiangsu Xuncheng Machinery Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

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Abstract

The utility model discloses an impedance composite muffler, which comprises a shell, a muffler cylinder, a first pipeline, a second pipeline and a third pipeline, wherein the shell is sleeved on the muffler cylinder, a first baffle plate, a second baffle plate and a third baffle plate are arranged in the muffler cylinder, the first baffle plate and the second baffle plate are arranged in parallel, the third baffle plate is arranged between the first baffle plate and the second baffle plate, a first cavity is formed between the first baffle plate and the end part of the muffler cylinder, the third baffle plate separates the first baffle plate and the second baffle plate into a second cavity and a third cavity, a sound absorption layer is formed between the second baffle plate and the other end part of the muffler cylinder, the sound absorption layer is arranged in the muffler chamber, the first pipeline penetrates through the first cavity and the second cavity and then stretches into the muffler chamber, the third pipeline is arranged in the third cavity and is communicated with the muffler chamber, the pipe diameter of the second pipeline is smaller than the pipe diameter of the third pipeline, and the second pipeline stretches into the third pipeline through the first cavity. Can sufficiently eliminate the noise of different frequencies, has simple structure, and is economical and practical.

Description

Impedance composite muffler
Technical Field
The utility model relates to the technical field of silencers, in particular to an impedance composite silencer.
Background
There are many types of mufflers, the most common being resistive and resistive mufflers. The resistive muffler is characterized in that the porous sound absorption material is utilized to reduce noise, sound energy is rubbed in the pores of the porous material and converted into heat energy to be dissipated, the middle-high frequency noise elimination effect is good, and the resistive muffler is used for filtering out sound waves with different frequencies through section mutation, so that the resistive muffler is suitable for eliminating middle-low frequency noise. Therefore, in order to improve the sound damping effect well, resistive sound dampers and resistive sound dampers are combined in a certain manner to form an impedance composite sound damper.
Most of the impedance composite type muffler on the market at present has the defect that the noise elimination effect is still not ideal, and in order to solve the problem, some manufacturers complicate the structure of the muffler, such as an impedance composite type muffler disclosed in China patent publication No. CN205406085U, a sound absorption partition plate is arranged at the resistive part, the sound absorption partition plate is formed by compositing two layers of 1.5mm cold-rolled steel plates filled with 3mm damping sound insulation plates, 50mm damping sound insulation plates and 0.8mm mesh sound insulation plates are sequentially arranged inside the cold-rolled steel plates, 3-stage expansion noise elimination is adopted at the resistive part, 0.8mm mesh sound insulation plates, 50mm heavy weight noise elimination rock wool, 3mm damping sound insulation rubber plates, 2.0mm cold-rolled steel plates, 3mm damping sound insulation rubber plates and 0.8mm mesh sound insulation plates are arranged at the resistive part, the structures of the sound absorption partition plate and the resistive part are all complicated, the pressure loss of the muffler is easily increased due to the complicated structure, and the noise elimination muffler is not economical and practical.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: overcomes the defects of the prior art, provides an impedance composite muffler, can sufficiently eliminate noise with different frequencies, and has simple structure, economy and practicability.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides an impedance combined type silencer, includes shell, a sound elimination section of thick bamboo, first pipeline, second pipeline and third pipeline, the shell cover is established on the sound elimination section of thick bamboo, be equipped with first baffle, second baffle and third baffle in the sound elimination section of thick bamboo, first baffle with second baffle parallel arrangement, the third baffle is located first baffle with between the second baffle, just the third baffle with first baffle with second baffle mutually perpendicular, form first cavity between the tip of first baffle and sound elimination section of thick bamboo, the third baffle will first baffle with separate into second cavity and third cavity between the second baffle, the second baffle with form the sound absorption layer in the sound elimination chamber with stretch into after the second cavity, the third pipeline is located in the third cavity and with the sound absorption chamber intercommunication, the third pipeline is less than in the second pipeline stretches into to the third pipeline.
Further, the shell is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is communicated with the silencing chamber through the first pipeline, and the air outlet pipe is communicated with the silencing chamber through the second pipeline and the third pipeline.
Further, an air inlet corresponding to the air inlet pipe and an air outlet corresponding to the air outlet pipe are formed in the silencing barrel, the first pipeline is communicated with the air inlet pipe through the air inlet, the other end of the first pipeline penetrates through the first partition plate and the second partition plate and then stretches into the silencing chamber, and the second pipeline is communicated with the air outlet pipe through the air outlet.
Further, in order to further eliminate the middle and high frequency noise, a plurality of opposite perforations are formed in the portion, located in the second cavity, of the first pipeline.
Further, a plurality of through holes are formed in the second partition plate.
Further, a plurality of silencing plates are arranged in the silencing chamber.
Further, the outer wall of the third pipeline is provided with sound-absorbing cotton.
Further, sound absorbing cotton is filled between the inner wall of the silencing barrel and the outer wall of the part of the first pipeline, which is located in the first cavity, between the outer wall of the part of the first pipeline, which is located in the first cavity, and the outer wall of the second pipeline, and between the inner wall of the silencing barrel and the outer wall of the second pipeline.
Further, in order to ensure the sealing performance of the muffler, a sealing member is provided between the outer shell and the muffler cylinder.
By adopting the technical scheme, the utility model has the following beneficial effects: the first pipeline is provided with a perforated hole, the second partition board is provided with a through hole, the sound absorption layer and the sound absorption plate are arranged in the sound absorption chamber, and the outer wall of the third pipeline is provided with sound absorption cotton, so that gas rubs for a plurality of times in the sound absorption barrel, sound energy is converted into heat energy and is emitted, and medium-frequency and high-frequency noise is sufficiently reduced; the gas flows into the silencing chamber through the first pipeline, then flows into the third pipeline through the silencing chamber, finally flows into the second pipeline through the third pipeline and then is discharged through the air outlet pipe, and the gas is subjected to three-time section mutation, so that middle-low frequency noise can be well eliminated; the utility model can sufficiently eliminate noise with different frequencies, and has simple structure, economy and practicability.
Drawings
Fig. 1 is a schematic structural diagram of an impedance composite muffler according to a first embodiment of the present utility model;
FIG. 2 is a schematic view of the first separator in FIG. 1;
FIG. 3 is a schematic view of the second separator in FIG. 1;
fig. 4 is a schematic structural diagram of an impedance composite muffler according to a second embodiment of the present utility model.
Reference numerals: 1 shell, 2 silencing barrels, 3 first baffle plates, 4 second baffle plates, 5 third baffle plates, 6 silencing chambers,
7 a first cavity, 8 a second cavity, 9 a third cavity, 10 sound absorbing cotton, 11 an air inlet pipe, 12 an air outlet pipe,
21 a first pipeline, 211 a perforated hole, 22 a second pipeline, 23 a third pipeline, 24 an air inlet, 25 an air outlet,
31 first mounting hole, 32 fourth mounting hole, 41 second mounting hole, 42 through hole, 43 third mounting hole,
61 sound absorbing layer, 62 muffler plate, 100 seal
Detailed Description
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1
As shown in fig. 1-3, in this embodiment, an impedance composite muffler is provided, including a housing 1 and a muffler barrel 2, the housing 1 is sleeved on the muffler barrel 2, a first partition plate 3, a second partition plate 4 and a third partition plate 5 are disposed in the muffler barrel 2, two ends of the first partition plate 3, the second partition plate 4, the third partition plate 5 and the muffler barrel 2 divide the interior of the muffler barrel 2 into four cavities, where the first partition plate 3 and the second partition plate 4 are disposed in parallel, the third partition plate 5 is disposed between the first partition plate 3 and the second partition plate 4, the third partition plate 5 is perpendicular to the first partition plate 3 and the second partition plate 4, a first cavity 7 is formed between the first partition plate 3 and the end of the muffler barrel 2, the third partition plate 5 divides a portion between the first partition plate 3 and the second partition plate 4 and the barrel wall of the muffler barrel 2 into a second cavity 8 and a third cavity 9, a fourth cavity is formed between the second partition plate 4 and the other end of the muffler barrel 2, and the fourth cavity is a muffler chamber 6.
The shell 1 is provided with an air inlet pipe 11 and an air outlet pipe 12, the silencing barrel 2 is provided with an air inlet 24 corresponding to the air inlet pipe 11 and an air outlet 25 corresponding to the air outlet pipe 12, the other end of the air inlet 24 is connected with a first pipeline 21, the other end of the air outlet 25 is connected with a second pipeline 22, the first pipeline 21 passes through the first cavity 7 and the second cavity 8 and then is communicated with the silencing chamber 6, a third pipeline 23 is arranged in the third cavity 9, the pipe diameter of the second pipeline 22 is smaller than that of the third pipeline 23, the second pipeline 22 extends into the third pipeline 23 through the first cavity 7, and the other end of the third pipeline 23 is communicated with the silencing chamber 6.
The first partition plate 3 and the second partition plate 4 are both plate-shaped structures corresponding to the cross section of the sound-damping cylinder 2, in this embodiment, the cross section of the sound-damping cylinder 2 may be rectangular, circular, etc., and the specific shape of the sound-damping cylinder 2 is not limited in this embodiment, and a sound-damping cylinder 2 with a suitable cross section shape may be selected according to the needs of the user.
The third partition board 5 is also in a plate-shaped structure, specifically, two opposite sides of the third partition board 5 are parallel to each other and respectively abut against the first partition board 3 and the second partition board 4, and the other two opposite sides of the third partition board 5 correspond to the inner wall of the silencing barrel 2.
The first partition plate 3 is provided with a first mounting hole 31 corresponding to the first pipeline 21, the second partition plate 4 is provided with a second mounting hole 41 corresponding to the first pipeline 21, the first mounting hole 31 and the second mounting hole 41 are coaxial with the air inlet 24, the first pipeline 21 passes through the first partition plate 3 after being communicated with the air inlet pipe 11 through the air inlet 24, the other end of the first pipeline 21 passes through the second partition plate 4 and then stretches into the muffling chamber 6, the first pipeline 21 is provided with a plurality of opposite perforations 211 at the part of the second cavity 8, meanwhile, the second partition plate 4 is also provided with a plurality of through holes 42, part of the air flowing into the first pipeline 21 through the air inlet pipe 11 directly enters the muffling chamber 6, the other part of the air flows into the second cavity 8 through the opposite perforations 211 on the first pipeline 21, and then flows into the muffling chamber 6 through the through holes 42 on the second partition plate 4, and in the process, the air is rubbed in the plurality of through holes 42 to be converted into heat energy to be dissipated, so that medium-and high-frequency sound waves in the introduced air are weakened.
In this embodiment, the inner wall of the part of the silencing chamber 6 in the silencing barrel 2 is provided with the sound absorbing layer 61, the sound absorbing layer 61 is filled with a sound absorbing material, and the sound absorbing material can be glass fiber, so that noise can be further reduced, and silencing effect is improved. Specifically, after the gas enters the muffling chamber 6, the gas rubs against the sound absorbing layer 61, and converts the sound energy into heat energy to be emitted, thereby further reducing the middle and high frequency noise.
The second partition board 4 is also provided with a third mounting hole 43 corresponding to the third pipeline 23, one end of the third pipeline 23 extends into the silencing chamber through the third mounting hole 43, the other end of the third pipeline 23 abuts against the first partition board 3, the outer wall of the third pipeline 23 is provided with sound-absorbing cotton 10, gas flows downwards after entering the silencing chamber 6, flows back and forth between the silencing chamber 6 and the third cavity 9 through the through hole 42 on the second partition board 4, and simultaneously collides with the sound-absorbing cotton 10 on the outer wall of the third pipeline 23, and the gas rubs with the sound-absorbing cotton 10 and the through hole 42, so that middle and high frequency noise can be reduced again.
The first partition plate 3 is also provided with a fourth mounting hole 32 corresponding to the second pipeline 22, the fourth mounting hole 32 is coaxial with the third mounting hole 43 and the air outlet 25, one end of the second pipeline 22 is communicated with the air outlet 25, the other end of the second pipeline 22 stretches into the third pipeline 23 through the fourth mounting hole 32 on the first partition plate 3, gas flows into the anechoic chamber 6 through the first pipeline 21 and undergoes a first cross section mutation, then flows into the third pipeline 23 through the anechoic chamber 6 and undergoes a second cross section mutation, finally flows into the second pipeline 22 through the third pipeline 23 and is discharged through the air outlet pipe 12, and because the pipe diameter of the second pipeline 22 is smaller than that of the third pipeline 23, the gas undergoes a third cross section mutation at the moment, and medium-low frequency noise can be well eliminated.
In the first cavity 7, the sound absorbing cotton 10 is filled between the inner wall of the silencing pot 2 and the outer wall of the first pipeline 21, between the outer wall of the first pipeline 21 and the outer wall of the second pipeline 22 and between the inner wall of the silencing pot 2 and the outer wall of the second pipeline 22, so that on one hand, noise can be further eliminated, and on the other hand, the first pipeline 21 and the second pipeline 22 can be prevented from being damaged due to overlarge gas flowing through vibration.
In order to prevent gas leakage, a sealing member 100 is arranged between the shell 1 and the silencing barrel 2, the sealing member 100 can be a sealing gasket, and is arranged between one end of the shell 1 with the air inlet pipe 11 and the air outlet pipe 12 and the corresponding end of the silencing barrel 2, meanwhile, in order to further improve the silencing effect, a sound absorbing cotton 10 can be filled between the inner wall of the shell 1 and the outer wall of the silencing barrel 2 or a vacuum cavity (not shown in the figure) can be arranged.
Example two
As shown in fig. 4, a point of difference between the present embodiment and the embodiment is that: the interior of the silencing chamber 6 is provided with a plurality of silencing plates 62, the silencing plates 62 are respectively arranged on the ends of the third partition plate 5 and the silencing cylinder 2, and the silencing plates 62 on the ends of the third partition plate 5 and the silencing cylinder 2 are arranged in a staggered mode, so that gas flows between the silencing plates 62 and rubs with the silencing plates 62, and medium-frequency noise and high-frequency noise are further reduced.
The technical problems, technical solutions and advantageous effects solved by the present utility model have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present utility model and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims (9)

1. The utility model provides an impedance combined type silencer, includes shell (1), sound elimination section of thick bamboo (2), first pipeline (21), second pipeline (22) and third pipeline (23), shell (1) cover is established on sound elimination section of thick bamboo (2), its characterized in that: the muffler is characterized in that a first partition plate (3), a second partition plate (4) and a third partition plate (5) are arranged in the muffler cylinder (2), the first partition plate (3) and the second partition plate (4) are arranged in parallel, the third partition plate (5) is arranged between the first partition plate (3) and the second partition plate (4), the third partition plate (5) is perpendicular to the first partition plate (3) and the second partition plate (4), a first cavity (7) is formed between the first partition plate (3) and the end part of the muffler cylinder (2), the third partition plate (5) divides the first partition plate (3) and the second partition plate into a second cavity (8) and a third cavity (9), a sound absorption chamber (6) is formed between the second partition plate (4) and the other end part of the muffler cylinder (2), a sound absorption layer (61) is arranged in the sound absorption chamber (6), a first pipeline (21) penetrates through the first cavity (7) and the second cavity (8) and stretches into the third pipeline (23) and is communicated with the third pipeline (23), the second pipe (22) extends into the third pipe (23) through the first chamber (7).
2. An impedance composite muffler according to claim 1, wherein: the shell (1) is provided with an air inlet pipe (11) and an air outlet pipe (12), the air inlet pipe (11) is communicated with the anechoic chamber (6) through a first pipeline (21), and the air outlet pipe (12) is communicated with the anechoic chamber (6) through a second pipeline (22) and a third pipeline (23).
3. An impedance composite muffler according to claim 2, wherein: the muffler is characterized in that an air inlet (24) corresponding to the air inlet pipe (11) and an air outlet (25) corresponding to the air outlet pipe (12) are formed in the muffler cylinder (2), the first pipeline (21) is communicated with the air inlet pipe (11) through the air inlet (24), the other end of the first pipeline (21) penetrates through the first partition plate (3) and the second partition plate (4) and then stretches into the muffler chamber (6), and the second pipeline (22) is communicated with the air outlet pipe (12) through the air outlet (25).
4. An impedance composite muffler according to claim 1, wherein: the part of the first pipeline (21) positioned in the second cavity (8) is provided with a plurality of opposite perforations (211).
5. An impedance composite muffler according to claim 1, wherein: the second partition plate (4) is provided with a plurality of through holes (42).
6. An impedance composite muffler according to claim 1, wherein: a plurality of silencing plates (62) are arranged in the silencing chamber (6).
7. An impedance composite muffler according to claim 1, wherein: the outer wall of the third pipeline (23) is provided with sound-absorbing cotton (10).
8. An impedance composite muffler according to claim 1, wherein: the sound absorbing cotton (10) is filled between the inner wall of the sound absorbing cylinder (2) and the outer wall of the part of the first pipeline (21) in the first cavity (7), between the outer wall of the part of the first pipeline (21) in the first cavity (7) and the outer wall of the second pipeline (22) and between the inner wall of the sound absorbing cylinder (2) and the outer wall of the second pipeline (22).
9. An impedance composite muffler according to claim 1, wherein: a sealing piece (100) is arranged between the shell (1) and the silencing cylinder (2).
CN202223486234.0U 2022-12-26 2022-12-26 Impedance composite muffler Active CN219202743U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223486234.0U CN219202743U (en) 2022-12-26 2022-12-26 Impedance composite muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223486234.0U CN219202743U (en) 2022-12-26 2022-12-26 Impedance composite muffler

Publications (1)

Publication Number Publication Date
CN219202743U true CN219202743U (en) 2023-06-16

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ID=86711039

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202223486234.0U Active CN219202743U (en) 2022-12-26 2022-12-26 Impedance composite muffler

Country Status (1)

Country Link
CN (1) CN219202743U (en)

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